Available Definitions:
1) a. - Fallen, as to physical or social condition; affected with decay; rotten; as, decayed vegetation or vegetables; a decayed fortune or gentleman.
2) v. t. - To cause to decay; to impair.
3) v. t. - To destroy.
4) n. - Gradual failure of health, strength, soundness, prosperity, or of any species of excellence or perfection; tendency toward dissolution or extinction; corruption; rottenness; decline; deterioration; as, the decay of the body; the decay of virtue; the decay of the Roman empire; a castle in decay.
5) n. - Destruction; death.
6) n. - Cause of decay.